Adblock Plus can be enabled/disabled at the Status Bar, so you can be more aggressive in what you block compared to a hosts file.

Each filter you install and your own are separate, so they can still be maintained separately, but it only applies to the Firefox profile you install it in.

Install the "Adblock Plus" extension with "Easylist US" filter subscription, which you can do from withing Adblock Plus.
'''You need to install''' the "'''[https://addons.mozilla.org/firefox/addon/1865/ Adblock Plus]'''" extension along with subscribing through its options to both "'''EasyList'''" and "'''Fanboys'''"
Known Adblock Plus subscriptions
* http://adblockplus.org/en/subscriptions
Adblock Plus - Open blockable items list - Ctrl+Shift+V (right click on icon)
shows all the urls on a page and if blocked by a filter shows the filter
* http://img213.imageshack.us/i/2010020591647pm.png/
* http://img651.imageshack.us/i/adpblockableitems.png/
* http://img3.imageshack.us/img3/671/adblockplustvguide.png
Adblock Plus can be enabled/disabled at the Status Bar, so you can be more aggressive in what you block compared to a hosts file.
Each filter you install and your own are separate, so they can still be maintained separately, but it only applies to the Firefox profile you install it in.